Table 1. Baseline characteristics of lung adenocarcinoma patients with tumor size less than or equal to 2 cm.
| Characteristic | Total, N (%) | Lobectomy, N (%) | Limited resection | P value* | |
|---|---|---|---|---|---|
| Segmentectomy, N (%) | Wedge, N (%) | ||||
| Sex | 0.247 | ||||
| Male | 290 (43.5) | 185 (41.9) | 18 (31.0) | 87 (52.4) | |
| Female | 376 (56.5) | 257 (58.1) | 40 (69.0) | 79 (47.6) | |
| Age, years | 0.000 | ||||
| ≤75 | 558 (83.8) | 391 (88.5) | 54 (93.1) | 113 (68.1) | |
| >75 | 108 (16.2) | 51 (11.5) | 4 (6.9) | 53 (31.9) | |
| Tumor size | 0.054 | ||||
| ≤1 cm | 104 (15.6) | 60 (13.6) | 12 (20.7) | 32 (19.3) | |
| 1–2 cm | 562 (84.4) | 382 (86.4) | 46 (79.3) | 134 (80.7) | |
| Visceral pleural invasion | 0.088 | ||||
| Yes | 120 (18.0) | 88 (19.9) | 3 (5.2) | 29 (17.5) | |
| No | 546 (82.0) | 354 (80.1) | 55 (94.8) | 137 (82.5) | |
| Lymphovascular invasion | 0.195 | ||||
| Yes | 25 (3.8) | 20 (4.5) | 1 (1.7) | 4 (2.4) | |
| No | 641 (96.2) | 422 (95.5) | 57 (98.3) | 162 (97.6) | |
| Adjuvant chemotherapy | 0.284 | ||||
| Yes | 69 (10.4) | 50 (11.3) | 2 (3.4) | 17 (10.2) | |
| No | 597 (89.6) | 392 (88.7) | 56 (96.6) | 149 (89.8) | |
| Adenocarcinoma subtype | 0.627 | ||||
| Lepidic | 74 (11.1) | 46 (10.4) | 10 (17.2) | 18 (10.8) | |
| Acinar | 332 (49.8) | 223 (50.5) | 32 (55.2) | 77 (46.4) | |
| Papillary | 234 (35.1) | 158 (35.7) | 16 (27.6) | 60 (36.1) | |
| Micropapillary | 3 (0.5) | 1 (0.2) | 0 (0) | 2 (1.2) | |
| Solid | 23 (3.5) | 14 (3.2) | 0 (0) | 9 (5.4) | |
*, χ2 test was calculated from logistic regression model stratified by trail. P value is for the comparison between lobectomy and limited resection.